用底线绘制半圆圈将其用作SpriteKit中的Skshapenode

Question

我想用底线绘制一个半圆圈，然后再次将其重用为形状节点。我该如何实施。这是我的半圈代码。 而且对某些代码进行了硬编码，因此对一些帮助表示赞赏。

func drawLine(from: CGPoint, to: CGPoint) {
// for line
    let myLine = SKShapeNode()
    let myPath = CGMutablePath()
    myPath.addLines(between: [from, to])
    myLine.path = myPath
    myLine.strokeColor = SKColor.blue
    myLine.lineWidth = 4
    addChild(myLine)
}
func drawSemi(){
// for semi circle

    let bezierPath = UIBezierPath(arcCenter: CGPoint(x: 0, y: 0), radius: 50, startAngle: 0, endAngle: .pi, clockwise: true)
    
    let pathNode = SKShapeNode(path: bezierPath.cgPath)
    
    pathNode.strokeColor = SKColor.blue
    
    pathNode.position = CGPoint(x: self.size.width/2, y: self.size.height/2)
    
    
    pathNode.lineWidth = 3
    
    
    
    addChild(pathNode)
}
func drawCompleteSemi(){
    drawSemi()
    drawLine(from: CGPoint(x: 450, y: 500), to: CGPoint(x: 550, y: 500))
}

Answer 1

只需在您的bezier路径上调用collect（），然后完全省略drawline函数

let bezierPath = UIBezierPath(arcCenter: CGPoint(x: 0, y: 0), radius: 50, startAngle: 0, endAngle: .pi, clockwise: true)
bezierPath.close() //<-- add this line